Tuesday, June 26, 2007

We all kind of know by now that LED bulbs last long. In fact that is the one thing manufacturers try to keep to. At the expense of other things like brightness. (And still some bulbs don't last.)

So here we go, I investigate this further.All LEDs are very sensitive to even minor fluctuations in current.My thinking is that because bulbs are built from many such LED units (with ever so slightly different qualities) they have to be under-driven to keep them last long. And that what most responsible manufacturers do. Problem is, this will affect brightness.

Lifetime is straightforward - you see when your LED dies. Brightness is a little murkier subject. There is candela, lumen etc. Luminous intensity itself is measured in various circles with various depth. Also LEDs are narrow beam "bare lights", so to compare them to compact fluorescent bulbs or to the now trendy long life light bulbs (incandescents) that are housed in a luminaire (or armature) doesn't compare apples with apples.

But let's check out others opinions.

cons (mostly)

Otherpower had a different position. But they recently reviewed it and them seem to be saying that on the whole they are not as bright as claimed.

Rob 'Linear' Arnold has a very thoughtful points about a catch 22 for household LED bulbs in the US: Underwriter laboratories (UL) doesn't see the need to list them, and surveyors doesn't see the need to approve them with UL listing. So there you go.

I still think secondary heat sinks (not just the aluminum plate in the junction) is needed for good brightness performance. And since the best of those is still for external flood light, I am going to assume that the rest is very promising, but in development for now.

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Well, I personally use LED lights in my office and I can see clearly under these lights and have no issues with it. The big plus is that we are saving close too $100 per month just by changing the bulbs and tubes to LED. All I can see that the money we saved in a year can pay off the initial high cost of LED light bulbs and tubes.

Good work,•The annual energy savings of our 12 watt LED lamp compared to a 75 watt Incandescent. As a direct replacement for a Incandescent lamp, our LED lamp consumes only 78% of the energy used by the Incandescent lamp. Led Energy Savings

LED light bulbsLED light bulbs are modern and compact lights that offer excellent energy efficiency. They aims to produce brighter, more energy efficient LED bulbs for everyday use in the home. LED light bulbs are carefully tested to ensure they will offer good value for money and keep working as long as possible.

It's an intrusting and you have great collection of Lights.led lights can be used to provide lighting for aquarium fish and plants. But what you should know before going through the LED.Thanks for sharing.....

Light Emitting Diodes (LEDs), already used in electrical equipment such as computers and mobile phones. LEDs not only use less power than current energy efficient light-bulbs but they are much smaller and can last years without needing to be replaced.

Wonderful post. I have seen your post. The post is helpful. Keep writing about LED light. LED light is a great item which is give us more brightness than traditional light by using lower electric energy than traditional light.

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